<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>用户名重复</title>
</head>
<body>
  <center>
    <h1>当前用户已存在</h1>
    <a href="/myweb/reg.html">请重新注册</a>
  </center>
</body>
</html>